Rolls for rolling grooved



2 Sheets-Sheet 1.

(No Model.)

A. J. MOXHAM.

ROLLS FOR ROLLING GROOVED GIRDER RAILS FOR STREET CARS.

Patented Jan..11

Winease/s (No Model.) 2 Sheets-Sheet 2.4

A. J. MOXHAM. ROLLS FOR ROLLING GROOVED GIRDER RAILS FOR STREET CARS.

No. 355,777. Patented Jan. 11, 1887.

UNITED STATES PATENT FFICE.

ARTHUR J. MOXHAM, OF JOHNSTOVVN, PENNSYLVANIA.

ROLLS FoR ROLLIN G GROOVED GIRDER-RAILS FOR STREET-CARS.

SPECIFICATION forming part of Letters Patent No. 355,777, dated January11, 1887.

' Application filed December 9, 1885. Serial No. 185,116. (No model.) I

To all whom, it may concern:

Be it known that I, ARTHUR J. MOXHAM, of J ohnstown, in the county ofOambria and State of Pennsylvania, have invented a newand usefulImprovement in Rolls for Rolling Grooved Girder-Rails for Street-Oars,which invention or improvement is fully set forth and illustrated in thefollowing specification and accompanying drawings.

The object of this invention is to provide a set of rolls for rollinggrooved girder-rails with grooving passes in regular course of rollingto finished form, thereby avoiding special rolling devices.

The invention will first be particularly described, and then speciallyset forth in the claims.

In the accompanying drawings, Figure 1 is a front elevation of aset ofroughing-rolls,and

Fig. 2 a front elevation of a set of finishingrolls, in which figurealone the invention now to be described is embodied.

In said figures the passes in the rolls are numbered from 1 to 11,inclusive, and the several parts indicated, respectively, byletters asfollows: Pass No. 4 is a dummy pass. Nos. 9 and 10 are dummy groovingpasses. All the remaining passes areedging passes. The shape of thebloom, its several changes efi'ected,and

the shape of thefinished rail are indicated by not as it enters thesame.

0 successivelythrough Nos. 5, 6, 7, and 8; thence on the flat.successively through the dummy grooving passes Nos. 9 and 10, and thenceon edge through the final finishing pass No. 11.

In the said passes the operations performed 5 upon the metal are asfollows: In the roughing passes Nos. 1 to 6, inclusive, the severalshapes of the passes so distribute the draft upon the metal as toquickly roll out and reduce the web and its stub end, while leaving asufficient mass of metal to form the upper portion or head of the rail.In the first two finishing passes,Nos.7'- and 8, the web and u nder partof the head of the rail are virtually completed, No. 8, however,excessively reducing the thickness of the web, as will be hereinaftermore particularly described. In the dummy grooving passes Nos. 9 and 10,the latter, being next to the last, technically known as a leading pass,the groove is put in the head of the rail, and at the same time saidpasses reduce to finished proportion that part of the head marked 61therein, as will be hereinafter more particularly described. Pass No. 11finishes the rail complete, as will be hereinafter more particularlydescribed.

The passes Nos. 1 to 7, inclusive, need no further description, the samebeing illustrated as of good design for passes preliminary to those inwhich the invention herein claimed I stead of the metal being rolled outand elongated in the direction of the rolls rotationthat is,transverselyto their axes. This widening action is generally local, parts of themassof metal being thus widened, while the remainder is subject to suchamount of elongation only as will prevent distortion during the passageof the mass of metal through the pass.

In pass No. 9 the groove to beput in the head of the rail is firststarted. In order to prevent distortion in the partly-formed rail and tosecure an even flow of metal, space is left for spread of the head atthe points a a and work or draft is put upon the point I).

The vertical draft thus put upon the point b.

tends to enlarge or upset the web 0 0;, hence the equalizing-draft putupon the various points is no greater than will suffice to preventdistortion during the grooving of the head of the rail. Greater speed,however, is provided for on the side a than on the side a, as, thebeveled side of the groove tending more that way, the spreading tendencyis more concentrated on that side. a

In pass N o. 10 the action is but a continuation of that in pass N o. 9,the head of the rail,

is furnished to the final finishing pass by the dummy, grooving passes asection of metal which must receive work or draft over its wholeexterior or contour to a suflicient extent to obviate all twisting ordistortion when bringing the rail true to the required finished shape.

It will be observed that the necessary action of the dummy groovingpasses Nos. 9 and 10 is to upset or thicken the web 0 c of the rail, ashas been above referred to, and, as has also been mentioned above, thatsaid web had previously been rolled sufficiently thin when the rail leftpass No. 8. As, in order to accomplish the other operations desired inpasses Nos. 9 and 10, it is necessary to upset the web 0 0 therein, theprovision of rolling down the web' so as to leave pass N o. 8sufliciently thin causes the upsetting in passes Nos. 9 and 10, torestore said web to only the thickness required for truing-up the samein the final finishing pass No. 11.

In consequence of the dummy grooving passes Nos. 9 and 10 thusdelivering to the final finishing pass, as above mentioned, a section ofmetal having a groove therein wider than is required in the head of thefinished rail, two advantages are obtained: First, the metal is workeddown at the points d in said grooving passes to practically the requiredfinished size; and, second, provision is made for edge or side draft inthe final finishing pass, which action and truing-up only are requiredto completely finish the rail. The effect of such side draft on the partd of the rail in the final pass No. -11 is, therefore, not to entirelyelongate or draw out said part, but, while closing it in, to thus narrowto accurate gage the groove in the head of the rail, the parts a aof'said head and the web 0 0 being at the same time trued up by beingelongated or drawn out sufficient only to prevent distortion by theoperation of so closing said groove.

I advisedly use the term dummy grooving as applied to passes Nos. 9 and10, in

contradistinction to the ordinary arrangement of passes for eflectingthe grooving of rails, wherein a side flange is first rolled outstraight in one set of passes and then turned up in another pass orpasses to form a grooved head.

It has heretofore been the custom to treat the grooving of girder-railsseparately from flange or tram and then turning up the same,

as above mentioned, in separate shapinggrooves, or by providing aspecial pair of tongue-rolls for this purpose, generally placedimmediately in front of the final pass, or else the whole mass of metalis acted on at onceby quarteringthat is, itis rolled between twovertical and two horizontal rolls at the same time, thus securingsimultaneous spread in two planes.

By the invention herein described and claimed the grooving is effectedin a regular course or manner, without special side apparatus ormanipulation, by passing the metal through rolls provided with passes soshaped and adjusted, as described, to each other that an earlier passanticipates by an excess of work the work to be performed in asucceeding pass or passes, wherein a restoration of form is effected bya readjustment of such excess while performing other shaping operations.In considering this method of grooving a girder-rail it must be borne inmind that a broad distinction exists between such method and theordinary method of grooving a fiat rail. In grooving a flat rail thewhole shape and body of the rail are brought within the zone of actionof the plane in which the rolls revolve, and the rail can be finishedwithout turning; but in rolling a deep girder-rail roll action in bothplanes is necessary; hence the rail, in order to be rolled, must beturned in the rolls, and such twofold rolling operation must be providedfor. In such twofold operation the invention herein described has beenembodied and adapted thereto in the manner above set forth.

The rolls illustrated in Figs. 1 and 2 are shown two-high; but they maybe made threehigh, if preferred. I do not limit myself to the exactshape of head and stub-ended web of rail shown, as it is evident thatthe exact contour of said parts is not necessaryto the principle or tothe actual operation of my invention.

Having thus fully described my said improvement, as of my invention Iclaim 1. A set of rolls for rolling grooved girderrails,provided withone or more dummy grooving passes, as 9 and 10, conformed to the generalshape of the finished rail desired, and having each a tongue shapedsubstantially as described, whereby an excess of spread and a largergroove are imparted to the head of the partly-finished rail than isrequired when finished, while substantially finished thickness isimparted to the other parts of the rail, substantially as and for thepurposes set forth.

2. A set of rolls for rolling grooved girderrails, provided with apreparatory edging pass, as 8, for excessively reducing the thickness ofthe web of the rail, and with one or more succeeding dummy groovingpasses, as 9 and 10, for imparting excessive spread of head and size ofgroove therein, whereby the upsetting action of said succeeding passesupon said web is caused to restore only the necessary thick-- ness" ofweb, substantially as andfor the purshape of rail required, whereby saidexcess of poses set forth. spread and groove are corrected and the fin:1:

3. A set of rolls for rolling grooved girderished rail delivered freefrom distortion, subrai1s,provided with one or more dummygroovstantially as and for the purposes set forth.

ing passes; as 9 and 10, having each'a tongue ARTHUR J. MOXHAM. shapedsubstantially as described, to excess- Witnesses: ively spread andgroovethe head of the rail, W. J. MURPHY, V

and with a finishing pass, as '11,-of the true W. E. HQoPEs.

